If the cleaner tool doesn't work, manual removal of hidden folders and registry keys is often necessary. 1. Delete AppData Folders Press Win + R , type %AppData% , and hit Enter. Delete the folder.
If you have tried all six solutions and still see the error, the issue may be deeper:
If you prefer not to uninstall the software, you can attempt to force the Windows Installer to reset the state of the components.
: Leftover keys from previous uninstalls or failed updates often block new installations. Installer Metadata Conflict AcroSup64.dll acrosup64.dll is not marked for installation
Ensure you aren't trying to install a 32-bit update over a 64-bit base version (or vice versa). Error 1723 - Problem with Windows Installer Package
Follow these troubleshooting workflows from the most straightforward approach to advanced structural registry edits. 1. Run the Adobe Acrobat Cleaner Tool
Delete the folder from Local , LocalLow , and Roaming directories. Restart your computer and try the installation again. If the cleaner tool doesn't work, manual removal
Conflicting background processes can interfere with installations.
If the error started occurring after a specific change (Windows update, driver installation, or software installation), restoring to a previous point can resolve the issue.
Most users encounter this problem during: Delete the folder
10. Manually edit Registry 11. Restore Windows to earlier point 12. Contact Adobe Support
If you're getting an error message that says "the file acrosup64.dll is not marked for installation", you can try these steps: * *